I've come up with a little not-so-clean but useful function
to avoid checking if a variable is set before reading its
value, specially useful for $_REQUEST and the like:
<?php
function toLocal( $source, &$dest, $default = null )
{
if( isset( $source ) )
$dest = $source;
else
$dest = $default;
}
?>
and then call it this way:
<?php
 toLocal( $_REQUEST['item_id'], $item_id, 0 );
?>
It checks wether the variable is set, copies it to a local
variable, and if it wasn't set, it assigns the new variable
a default value, all in one line, preventing you to have to
always check for isset() before trying to read its value.
Gotta call it with because if the variable is not set, then
trying to pass it as an argument will yield a warning.
Petruza.
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